Specifically, we construct the qubit threads model as shown in figure REF . Consider dividing the boundary quantum system into \(N\)  elementary regions denoted as \({A_1}\) , \({A_2}\) , ..., \({A_N}\) . \(N\)  can be taken to be extremely large such that the size of each elementary region is very small, however, for physical reasons, we will make each small piece much larger than the Planck scale to ensure the validity of RT formula. The purpose of this division is to extract the information of the entanglement structure of the holographic boundary quantum system more sufficiently and precisely, so as to describe the mechanism of holographic principle more effectively. A natural way to do this is to take all the \(N\)  elementary regions to be of the same size (which is easy to do for the one-dimensional spatial space of a \({CFT_2}\) ). For the case involving \(N\)  elementary regions, \(N\left( {N - 1} \right)/2\)  independent thread bundles will be introduced. In other words, the multiflow characterizing the corresponding locking thread configuration will be composed of \(N\left( {N - 1} \right)/2\)  component flows \({\vec{v}_{ij}}\) . Next, in order to for the constructed locking thread configuration to reflect the entanglement structure information of the boundary quantum system correctly and reasonably, we need to make use of the so-called “CFF=PEE” scheme proposed in [1]}. According to this scheme, a special type of locking bit thread configuration can be designed such that the component flow fluxes in the multiflow can exactly match the partial entanglement entropies in the boundary quantum system. In brief, this scheme requires that the fluxes \(\left\lbrace  {{F_{ij}}} \right\rbrace \)  of the locking thread configuration satisfy the following requirements:
\({S_{a\left( {a + 1} \right) \ldots b}} = \sum \limits _{s,t} {{F_{st}}} , \,\,\,\,\, s \in \left\lbrace  {a,a + 1, \cdots ,b} \right\rbrace , t \notin \left\lbrace  {a,a + 1, \cdots ,b} \right\rbrace ,\) 
